package com.nowcoder.community.service;


import com.nowcoder.community.dao.CommentMapper;
import com.nowcoder.community.entity.Comment;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.SensitiveFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.util.HtmlUtils;

import java.util.List;

@Service
public class CommentService implements CommunityConstant {
    @Autowired
    private CommentMapper commentMapper;
    @Autowired
    private SensitiveFilter sensitiveFilter;
    @Autowired
    private DiscussPostService discussPostService;

    public List<Comment> findCommentsByEntity(int entityType,int entityId,int offset,int limit)
    {
        return commentMapper.selectCommentsByEntity(entityType,entityId,offset,limit);

    }
    public int findCommentCount(int entityType,int entityId){
        return commentMapper.selectCountByEntity(entityType,entityId);

    }
    @Transactional(isolation = Isolation.READ_COMMITTED ,propagation = Propagation.REQUIRED)
    public int addComment(Comment comment){
        if(comment==null){
            throw new IllegalArgumentException("参数不能为空！");

        }
        //添加评论
        comment.setContent(HtmlUtils.htmlEscape(comment.getContent()));
        comment.setContent(sensitiveFilter.filter(comment.getContent()));
        int rows =commentMapper.insertComment(comment);
        //更新帖子评论数量
        if(comment.getEntityType()==ENTITY_TYPE_POST){
            int count = commentMapper.selectCountByEntity(comment.getEntityType(), comment.getEntityId());
            discussPostService.updateCommentCount(comment.getEntityId(),count);
        }
        return rows;

    }
    public Comment findCommentById(int id){
        return commentMapper.selectCommentById(id);
    }
    public List<Comment> findUserComments(int userId, int offset, int limit) {
        return commentMapper.selectCommentsByUser(userId, offset, limit);
    }
    public int findUserCount(int userId) {
        return commentMapper.selectCountByUser(userId);
    }
}
